Lamp globe



Jan. 26, 1937. J UHRMANN 2,o68,967

LAMP GLOBE Filed April 3, 1933 Patented Jan. 26, 1937 e UNITED STATES LAMP GLOBE Carl J. Uhrmann, Chicago, lil., assignor to George L. Chamberlain Application-April 3, 1933, Serial No. 664,()88

10 Claims.

This invention relates to lamp globes, and its primary object is to provide new and novel means tor reinforcing the globe about the neck thereof and particularly about the neck and around the throat of the globe.

Another object is to provide a one-piece' metal ring spun about the neck and throat of the globe to make the same a permanent part of the glass globe, to furnlish a protective means and a cushion against mechanical shock and prevent chipping and breaking of the globe about the neck thereof.

A further object is to provide a one-'piece continuous non-rusting metal about the neck and throat of the lamp globe and have the same spaced slightly from the tting part of the neck so as to provide a space between the ring and the globe body.

A still further object is the provision of a method for spinning a relatively soft metal ring about the neck and throat of a lamp globe which consists in placing the ring around the neck` of the globe and then revolving the globe to spin thecontinuous ring thereon so as to make the ring an integral part of the globe. The forming of the ring is done by using a Wood tool to press the ring to the desired shape and configuration while the globe and its accompanying ring is revolved.

Numerous other objects and advantages will be apparent throughout the progress, of the following specification.

The accompanying drawing illustrates a selected embodiment of the invention and the viewstherein are as ollows: i

Fig. 1 is a detail sectional view of the lamp globe.

Fig. 2 is a detail sectional view of the improved ring.

Fig. 3 is a detail sectional view of the globe and ring showing the manner in which the same is first applied to the globe. I

Fig. 4 is a view similar to` Fig. 3 showing an advanced step in spinning the ring to the globe.

Fig. 5 is a detail elevation of the globe with the ring applied thereto. v

Reterring to the drawing, 6 designates a lamp globe of any conventional type and which is preferably made of glass. The glass may be clear, opaque, frosted or colored to meet the necessary requirements for which the globe is designed. The present globe, however', shown tor illustrative purposes only, is a lamp globe used for street I lighting purposes and is generally globular in shape although the invention is applicable to various types of globes regardless of their shape. The globe 6 is globular in shape and has a neck 1 which is connected to the main part or body of the globe by an inwardly curved connecting portion 8, the neck 'I and the curved portion 8 be- 5 ing integrally molded with the body of the globe. The curving of the globe between the body and the neck 1 provides the usual or conventional recess 9 into which the fastening members or screws protrude a predetermined distance for 'holding 10 the globe in position on the post or standard'to prevent accidental removal thereof. The neck 1 is in the shape of an annulus, there being an opening lll of sufiicient size to permit the globe to be inserted in position over a lamp. The globe so far described is more or less conventional in design but the disadvantage of the globe of the conventional design is that the outer edge ll of the neck, and the inner edge |2 of the neck about .the throat of the globe will chip and break 'andprobably cause injury to a person when the globe is handled, particularly in installing or cleaning the globe. Another objection inherent in the conventional lamp construction is that the screws provided in the usual globe support 5 en a e the glass at the circular portion 8, and thus during expansion of the globe, caused by the heat of the lamp therein, will cause the globe to crack or break by the impingement of the holding screws.

'To eliminate these disadvantages a ring l3 is provided. The ring, as commercially made,

comprises an aluminum stamping, although the ring maybe made of any other relatively soft rust-resisting metal. The ring l3, as made commercially, has a straight upwardly extending portion !4 from which a straight bottom portion !5 is bent. The free end !6 of the ring is bent and extends upwardly from the point ll.

This construction provides an annular pocket s into which the neck 'I of the globe is received.

The ring l3, when applied in position, as shown in Fig. 3, has the outer side l4 extending upwardly *from the bottom edge s of the neck with the inclined portion !6 engagingthe inner side walls or throat 20 of the neck. The globe is put on a suitable device and rotated at the proper speed with the ring !3 in position as shown in Fig. 3. A spinning tool 2! is made of hard Wood and has a smooth blunt end ZI', the diameter of which is greater than the diameter of the globe 9. Thus,

'during the rotating movement of the globe and ring the ring is permanently spun about the neck and throat of the globe During the .spinning operation the spinning tool 2| will cause the metal ring [3 to fit snugly against the globe at the points designated by the numerals 22, and inasmuch as the diameter of the spinning tool is greater than the diameter of the .curved portion 8 of the neck, the radius or diameter of the portion of the'ring designated by the numeral 23:

will be larger than the diameter of the neck indicated by the numeral 24. Therefore, a space 25 will be provided between the inside of the ring and the outside of the globe as shown in Fig. 4. This space provides a shock absorbing medium or cushioning means between the screw fastening members and the globe so that the screws may be screwed tightly against the ring without the resultant danger of fracturing or breaking the globe in any way. Furthermore, this space provides expansion means permitting the globe to expand and contract.

During the spinning operation, the upper edge of the ring will become smooth and rounded as indicated at 26, and the inner edge 21 of the ring will be rounded and smooth and pressed against the inner surface of the globe about the throat thereof making the globe smooth and clean and preventing any sharp jagged edges.

The invention provides a lamp globe provided with a cushioning ring formed thereabout to overcome shocks and strains, to reinforce the globe about the throat thereof, and to eliminate jagged edges and prevent chipping and breaking.

The ring is made of thin aluminum and permits contraction and expansion of the globe. The ring is so positioned relative to the globe so that a space or recess is left between the metal and the glass globe so that the holding screws on the support, when tightened in position, will bear against the metal opposite the space or recess and prevent any force or stress from being applied directly against the glass globe itself. Also, the ring itself forms a cushion between the globe and the holding screws.

The invention provides a lamp globe having a continuous metal ring formed thereon and including a part of the globe. The ring can be fastened to the globe at very little expense and the cost of the ring itself is small. Therefore, at an exceptionally low cost, the life of the globe is considerably increased, the dangerous sharp edges of the globe about the neck and throat of the globe are dispensed with, and the danger 'of the fastening means breaking the globe is eliminated. The ring further adds to the omamental appearance of the globe as well as strengthening it.

Changes may be made in the form, construction, and arrangement of the parts without departing from the spirit of the invention or sacrificing any of its advantages, and the right is hereby reserved to make all such changes as fairly fall within the scope of the following claims.

The invention is hereby claimed as follows:

1. A lamp globe having an opening therein, a neck for said globe about the opening, and a onepiece metallic ring spun about the neck of said globe, said ring having portions thereof extending inwardly and outwardly of the globe about the neck to reinforce the globe on both sides of the neck, one of said portions of the ring being slightly spaced from the globe to provide a. protective cushion which will yield when fastening means are tightened to hold the globe in place piece metallic ring spun about the neck of said globe and having a portion thereof extending inwardly of the globe about the neck to reinforce the globe on both sides of the neck, said ring about the outside of the globe being spaced from a part of the globe to provide a cushion thereabout.

3. A lamp globe having an opening therein, a neck for said globe about the opening, and a ring to reinforce said neck on both sides of the neck and at the bottom of the globe, said ring having a portion extending about the outside of the neck and a portion extending interiorly of the globe about the inside of the neck, said portions being connected by a fiat portion upon which the base of the neck is received, the outer' edge of said ring being shaped to the general contour of the globe about the neck thereof and having a part spaced from a part of the globe about the neck.

4. A lamp globe having an opening therein, a neck for said globe aboutthe opening, and a ring for reinforcing the globe about the neck, said ring having an annular channel formed therein to receive the lower end of said neck, the side walls of said ring channel being shaped to engage the neck on both the interior and exterior surfaces thereof, there being a space between the exterior surface of the globe at the neck and the ring to provide a cushion between the ring and the globe.

5. A lamp globe having an opening therein, a neck for said globe about the opening, an integral inwardly curved portion between the neck and the globe and providing an annular groove about the globe, a one-piece metal reinforcing ring fastened to the globe and having an exterior portion extending exteriorly of the globe about the neck and covering the said groove, said exterior portion of the ring being curved inwardly at the groove in the globe to conform generally thereto, the diameter of said curved portion of the ringbeing greater than the diameter of the groove in the globe to provide a space between the globe and the ring and provide a resilient portion. against which fastening means may abut without danger of damaging the globe.

6. The method of forming a continuous metal reinforcing ring about a lamp globe which consists in placing a metal ring about the neck of the globe and spinning the metal ring about said globe to form a protector about the outside, bottom, and inside of the globe about the neck, the

' groove in the neck which consists in placing the ring over the neck and spinning the ring about the neck with a spinning tool having its engaging end rounded and larger in diameter than the diameter of the groove so that a space will be provided between thering and the groove when the ring is spun about the neck.

8. A lamp globe having an opening therein, a neck for said globe about the opening, a onepiece metallic ring spun about the neck of said globe and having portions extending within and portions extending outside of the globe about the neck to reinforce the globe on both sides of the neck, and a bottom portion connecting the first two named portions and against which the bottom of said neck engages, the portion of said ring about the outside of the globe being spaced from a part of the globe to form a cushion between the globe and the ring.

9. A lamp globe having an opening therein, a neck for said globe about the opening, a onepiece metallic ring spun about the neck of said globe and having portions extending within and portions extending outside of the globe about the neck to reinforce the globe on both sides of the neck, and a bottom portion connecting the first two named portions and against which the bottom of said neck engages, the portion of said ring about the outside of the globe yieldingly engaging the globe to provide a cushion thereabout.

10. A lamp globe having an opening therein, a neck for said globe about the opening, a onepiece continuous ring permanently fixed to the globe and providing a protector -for the globe to cover the dangerous sharp edges of the globe about the neck thereof and diminishing the danger of fastening means breaking the globe, said ring comprising a portion engaging the inside of the globe, a bottom against which the neck engages, and an outer portion integral with the bottom portion and engaging the outside of the globe, one side of the ring being spaced a slight distance from the globe to provide a yielding protective cushion against which the globe fastening means engage. v

. CARL J. UHRMANN. 

